OK, guys 'n dolls. I've modified the groups as follows:
New member - up to 50 posts.
Member - 51 - 499 posts.
Senior Member - 500+ posts.
I hope this satisfies most of those who've responded here, and PM'ed or e-mailed me. I'm sorely tempted to have a "blabbermouth" group, but in the interests of not offending the thin-skinned, I'll refrain. Good, ain't I?